Dear all,

I try to find the eigenvectors of a general 2x2 matrix using

var('a,b,c,d');show(Matrix(2,2,[a,b,c,d]).eigenvalues());
show(Matrix([[a,b],[c,d]]).eigenvectors_left())

The eigenvalues are ok, but I get an error for the eigenvectors.
What am I doing wrong here ?

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